Divided wheel-rim serving as tire-retainer.



R. KRONENBERGH DIVIDED WHEEL RIM SERVING AS TIRE RETAINER.

' APPLICATION FILED APR. 7, 1908.

Patented Jan. 5, 1909.

J" A ew /Z 6 1% monts sur 1 as a nut, a ring, or a cap.

' the rim is one half oi a cylindrical projection,

H U DO LF KlrtO N EN BE R G,

caries.

OF (JI-ILIGS, GERBIANY.

DIVIIDED WHEEL-RIM SERVING AS TIRE-RETAINER.

Application filed April 7,

To all whom it may concern:

Be it known that l, RUnoLr linonemntizs, a subject of the German Emperor, residing at Ohligs, Germany, have invented certain new and useful improvements in Divided. l i hceh v Rims Serving as lire-Retainers, of which the 1 following is a full, clear, and exact specification.

This invention relates to a device by which j wheel rims for pneumatic tires divided in g their symmetrical plane can be held together. liims so divided are already ln'mwn and have for their object to facilitate an easy removal and replacement of the pneumatic tire, especially of the outer cover.

The new device according to the present invention consists of a number of semi-cylindrical projections extending from the inner side of the divided rim radially in the direction towards the hub and having their plans face in the plane of division of the wheel rim. 'llrese projections are held together by elelly these means a quick and easy removal and re placement of the halves of the rim is attained.

The drawing illustrates a number 1" modifications oi the invention.

Figure 1 is a cross-section through the rim, the projections and clamping means provided with screw thread. Fig. 2 is a modification of the clamp in elevation having no screw thread, other means being used for securing the clamping element. Fig. 25 shows at right angles the means here ci'nploycd. Fig. 4 ice cross-section illustrating another inodiiiration. Fig. 5 is the bottom view thereof, and Fig. 6 shows the special clampizn, cap used in this modi'lied form.

Accra-ding to Fig. l the rim is composed of two halves a and b. Integral to each part of provided with screw thread on the periphery, thus the half-cylinder c is firmly connected with the half rim 0, and the other, 0!, with the half rim 6. Upon'these two halves c and d,

l l l i l l l l ii Specification of Letters Patent.

1908. Serial No. 425.623.

Patented Jan. 5, 18019.

after they have been placed together, an open or closed cap a is screwed, which assures a firm connection of the two half rims a and b when the wheel is in use.

Modifications of the invention are illustrated in the following figures '.2-6. Ac cording to Figs. 2 and 3, a cap f, having a smooth inner surface, is pushed over the semicylindrical projections being also smooth, and having no screw thread, and hold fast upon them by means of a bay'onetslot joint. big-s. -1--6 show the projections to be provided with an annular recess or groove 5 and with two opposite notches it cut into the c lindriral surface, of even depth witl'i t is groove. "lwo corresponding proje tions i of the cap are adapt-ed to lit into th notches, so that the cap can be siipped over the lugs c and d. Then, when the cap is turned, the parts i engage the groove g and thereby as sure the connection.

Having thus described my invention what I claim is:

l. In a wheel rim divided in its symmetrical plane, for clamping the pneumatic tire, inner send-cylindrical. rejections having their straight portion in t e plane of division, annular bodies fitting over the cylindrical surface of said projections, and means to secure said annular bodies upon the projections, substantially as described.

3. in a wheel rim divided in its symmetricalplane, for clamping the pneumatic tire, inner seini-cylindrical their straight portion in t re plane of division, and having screw thread on the periphery and screw caps to 'iit' said thread, substantially as described.

in testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

RUDOLF KRONENBERG.

Witnesse LOUIS VANDORF, BEssiE F. DUNLAP.

rejections having 

